EP 2234104 B1 20170614 - VECTOR QUANTIZER, VECTOR INVERSE QUANTIZER, AND METHODS THEREFOR
Title (en)
VECTOR QUANTIZER, VECTOR INVERSE QUANTIZER, AND METHODS THEREFOR
Title (de)
VEKTORQUANTISIERER, INVERSER VEKTORQUANTISIERER UND VERFAHREN DAFÜR
Title (fr)
QUANTIFICATEUR VECTORIEL, QUANTIFICATEUR VECTORIEL INVERSE, ET PROCÉDÉS À CET EFFET
Publication
Application
Priority
- JP 2009000133 W 20090115
- JP 2008007255 A 20080116
- JP 2008142442 A 20080530
- JP 2008304660 A 20081128
Abstract (en)
[origin: EP2234104A1] Disclosed is a vector quantizer capable of improving the quantization accuracy of vector quantization to switch over the codebook of the vector quantization of a first stage depending on the type of feature having a correlation with a vector to be quantized. In the quantizer, a classifier (101) selects a classification code vector indicating the type of feature having the correlation with the vector to be quantized from a plurality of classification code vectors. A switch (102) selects a first codebook corresponding to the type from a plurality of first codebooks. An error minimizing section (105) selects a first code vector closest to the vector to be quantized from a plurality of first code vectors constituting the selected first codebook. An additivity factor determining section (106) selects an additivity factor vector corresponding to the type from a plurality of additivity factor vectors. The error minimizing section (105) selects a second code vector closest to the residual vector between the selected first code vector and the vector to be quantized from a plurality of second code vectors by using the selected additivity factor vector.
IPC 8 full level
G10L 19/038 (2013.01); G10L 19/06 (2013.01); G10L 19/16 (2013.01); H04N 19/94 (2014.01)
CPC (source: EP US)
G10L 19/038 (2013.01 - EP US); G10L 19/12 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2234104 A1 20100929; EP 2234104 A4 20150923; EP 2234104 B1 20170614; CN 101911185 A 20101208; CN 101911185 B 20130403; EP 3288029 A1 20180228; ES 2639572 T3 20171027; JP 5419714 B2 20140219; JP WO2009090876 A1 20110526; US 2010284392 A1 20101111; US 8306007 B2 20121106; WO 2009090876 A1 20090723
DOCDB simple family (application)
EP 09701918 A 20090115; CN 200980101904 A 20090115; EP 17175732 A 20090115; ES 09701918 T 20090115; JP 2009000133 W 20090115; JP 2009549986 A 20090115; US 81211309 A 20090115